Question

question 4 (1 point)
what is an example of positive feedback?
labour contractions during birth
an air conditioner turns on when the temperature rises
sweating when you are hot
increased respiration during exercise
question 5 (1 point)
which internal factor must be monitored and adjusted to maintain homeostasis? choose the best answer.
blood pressure
internal temperature
blood ph
all of the above
question 6 (1 point)
which of the following is an effector activated by the hypothalamus when the temperature of the body is lower than the set point?
sweat glands initiate sweating
move to a warmer location or put on a sweater
skeletal muscles contract
skin blood vessels dilate

Explanation:

• Question 4: Positive feedback amplifies a response. During birth, contractions stimulate more contractions (positive feedback). Air - conditioner turning on (negative feedback for temperature), sweating (negative feedback for heat), and increased respiration (negative feedback for exercise - related changes) are negative feedback.
• Question 5: Homeostasis requires monitoring and adjusting multiple internal factors. Blood pressure, internal temperature, and blood pH are all crucial for maintaining a stable internal environment.
• Question 6: When body temperature is below set - point, the hypothalamus activates skeletal muscle contraction (shivering) to generate heat. Sweat glands initiate sweating (for cooling, when temperature is above set - point), moving to a warmer place is a behavioral response (not directly an effector activated by hypothalamus in the physiological sense as asked), and skin blood vessels dilate (for heat loss, when temperature is above set - point).

Answer:

• Question 4: labour contractions during birth
• Question 5: all of the above
• Question 6: skeletal muscles contract